Saw-tooth gage.



No. 697,883. Patented Apr. l5, I902. A

R. E. POINDEXTEB. SAW TOOTH GAGE.

(Application filed Oct. 8, 1901.)

(No Model.)

Finuaufoz 110,6 e151? Paznaexier 4% names MMAX v NTTFD mamas nrnnrROBERT E. POINDEXTER, OF INDIANAPOLIS, INDIANA.

SAW-TOOTH GAG E.

SPECIFICATION forming part of Letters Patent No. 697,883, dated April15, 1902.

Application filed October 8,1901. Serial No. 77,994. (No model.)

To aZZ whom it may concern.-

Be it known that I, ROBERT E. POINDEXTER, a citizen of the UnitedStates, residing at Indianapolis, in the county of Marion and State ofIndiana, have invented certain new and useful Improvements in Saw-ToothGages, of which the following is a specification.

My said invention consists in certain improvements in the details ofconstruction of combined saw jointers and gages of that general formshown in several patents heretofore granted to 1nefor example, PatentNo. 377,328, of January 31, lSSS-the present invention relatingparticularly to an improvement in the form of the gage-plate, wherebyitis adapted not only to serve as a gage in filing oif the points of theclearing or rake teeth to the proper length, but also as a gage infiling their beveled faces to the proper and a uniform pitch, all aswill be hereinafter more particularly described and claimed.

Referring to the accompanying drawings, which are made a part hereof,and on which similar letters of reference indicate similar parts, Figurel is an elevation of one side of a tool of the character mentioned,showing its position on a saw, as when it is to be used as a gage forshaping one of the rake-teeth; Fig. 2, an elevation of the reverse sideof the tool, the two positions of the file, showing how said file isclamped therein for use in jointing either the points or sides of theteeth, being indicated by dotted lines; and Fig. 3, a cross-section onthe dotted line 3 3 in Fig. 2 looking in the direction therefromindicated by arrows.

In said drawings the portions marked A represent the frame or block ofthe tool, and 13 the gage-plate. Said block A is of substantially theform shown and described inv the patent above mentioned, having aclamping-plate A, mounted to slide in a transverse way and adapted to beoperated by a screw a, which engages said plate and ascrew-threadedperforation in a lug a on said block to clamp a file F in an edgewiseposition between a flange a on its outer end and shoulders a in ribsformed on the block and in a flat position between its inner end andprojections a on said block, as is well understood.

The gage-plate B is mounted in a recess in one side of the block, thebottom of which is properly formed to support it and is secured inposition by a screw h. Liners b may be interposed between the plate andbottom of the recess to adjust its height properly. The top of saidplate is formed with two transverse V-shaped grooves Z), one at each endof the longitudinal slot 12 through which the rake-teeth extend when thetool is being used for gaging them.

In Fig. 1 is shown a fragment of a saw S with one of its rake-teeth R inposition to be operated upon. The outside or straight side of the toothrests against the end of slot b showing the point projecting throughsaid slot and slightly above the surface of the plate 13, with aportionof its beveled side projecting beyond the bevel of the adjacent side ofgroove b In operation the filer files oil? the point of said tooth evenwith the top of the gage-plate and then files down the bevel even withthe beveled side of the groove. The exact form of point desired is thusgiven to the tooth and all the teeth made of uniform shape. After thetool has been removed the filer can file down the remainder of thebeveled sides of the tooth to conform to the bevel of the point. Thepoints of the tooth are, however, shaped by the gage-plate and left asthus shaped, insuring not only uniform length of these teeth, butuniform pitch and form, with the advan tages which are well known. Inuse the tool is placed on the saw as shown in Fig. 1, the point of therake-tooth being brought against one end of slot b The filer files downboth the point and bevel to conform to the gage, then slides the tool tobring the other side of the tooth against the other end of slot 22 anddresses the other point in the same way, each tooth being successivelyoperated upon until the saw is complete. The teeth after being so formedat the points are then preferably beveled correspondingly for the entirelength of the beveled sides.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The combination, in a saw-jointer and gage, of a gage-plate having ahorizontal gaging-surface for the points of the teeth, and

also a tapered gaging-surface for the sides of transverse beveledsurface, substantially as the teeth, substantially as set forth. setforth.

2. In a saw-jointer and gage, the combina- 4:. A gage-plate for formingthe points of 15 tion, of the block and the gage-plate formed saw-teethhaving a separate form for both 5 with a longitudinal slot through whichthe the points and sides thereof.

teeth project when being operated upon, and In witness whereof I havehereunto set my transverse grooves at each end of said slot hand andseal, at Indianapolis, Indiana, this formed with beveled sides to serveas a gage 30th day of September, A. D. 1901.

in forming the bevel of the teeth, substan- ROBERT E. POINDEXTER. [1 s]10 tially as set forth. WVitnesses:

3. A gage-plate for forming the points of H. E. SMOOK,

saw-teeth having a square top surface, and a D. K. HALL.

